CVE-2026-28465
OpenClaw voice-call < 2026.2.3 - Webhook Verification Bypass via Forwarded Headers
OpenClaw's voice-call plugin versions before 2026.2.3 contain an improper authentication vulnerability in webhook verification that allows remote attackers to bypass verification by supplying untrusted forwarded headers. Attackers can spoof webhook events by manipulating Forwarded or X-Forwarded-* headers in reverse-proxy configurations that implicitly trust these headers.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
OpenClaw voice-call < 2026.2.3 - Webhook Verification Bypass via Forwarded Headers
OpenClaw's voice-call plugin versions before 2026.2.3 contain an improper authentication vulnerability in webhook verification that allows remote attackers to bypass verification by supplying untrusted forwarded headers. Attackers can spoof webhook events by manipulating Forwarded or X-Forwarded-* headers in reverse-proxy configurations that implicitly trust these headers.
- Record
CVE-2026-28465- CVSS 4.0
- 8.2 High
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N - CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-290
- Updated
- 2026-11-02
EUVDEUVD-2026-9911
OpenClaw's voice-call plugin versions before 2026.2.3 contain an improper authentication vulnerability in webhook verification that allows remote attackers to bypass verification by supplying untrusted forwarded headers. Attackers can spoof webhook events by manipulating Forwarded or X-Forwarded-* headers in reverse-proxy configurations that implicitly trust these headers.
- Record
EUVD-2026-9911- CVSS 4.0
- 8.2 High
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-3m3q-x3gj-f79x
OpenClaw optional voice-call plugin: webhook verification may be bypassed behind certain proxy configurations
Affected Packages / Versions
This issue affects the optional voice-call plugin only. It is not enabled by default; it only applies to installations where the plugin is installed and enabled.
- Package:
@openclaw/voice-call - Vulnerable versions:
< 2026.2.3 - Patched versions:
>= 2026.2.3
Legacy package name (if you are still using it):
- Package:
@clawdbot/voice-call - Vulnerable versions:
<= 2026.1.24 - Patched versions: none published under this package name; migrate to
@openclaw/voice-call
Summary
In certain reverse-proxy / forwarding setups, webhook verification can be bypassed if untrusted forwarded headers are accepted.
Impact
An external party may be able to send voice-call webhook requests that are accepted as valid, which can result in spoofed webhook events being processed.
Root Cause
Some deployments implicitly trusted forwarded headers (for example Forwarded / X-Forwarded-*) when determining request properties used during webhook verification. If those headers are not overwritten by a trusted proxy, a client can supply them directly and influence verification.
Resolution
Ignore forwarded headers by default unless explicitly trusted and allowlisted in configuration. Keep any loopback-only development bypass restricted to local development only. Upgrade to a patched version.
If you cannot upgrade immediately, strip Forwarded and X-Forwarded-* headers at the edge so clients cannot supply them directly.
Fix Commit(s)
a749db9820eb6d6224032a5a34223d286d2dcc2f
Credits
Thanks @0x5t for reporting.
- Record
GHSA-3m3q-x3gj-f79x- CVSS 4.0
- 8.2 High
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N - CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-287, CWE-290, CWE-345
- Updated
- 2026-11-02
NVD
OpenClaw's voice-call plugin versions before 2026.2.3 contain an improper authentication vulnerability in webhook verification that allows remote attackers to bypass verification by supplying untrusted forwarded headers. Attackers can spoof webhook events by manipulating Forwarded or X-Forwarded-* headers in reverse-proxy configurations that implicitly trust these headers.
- Record
CVE-2026-28465- CVSS 4.0
- 8.2 High
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-290
- Updated
- 2026-11-02
OSV
OpenClaw voice-call < 2026.2.3 - Webhook Verification Bypass via Forwarded Headers
OpenClaw's voice-call plugin versions before 2026.2.3 contain an improper authentication vulnerability in webhook verification that allows remote attackers to bypass verification by supplying untrusted forwarded headers. Attackers can spoof webhook events by manipulating Forwarded or X-Forwarded-* headers in reverse-proxy configurations that implicitly trust these headers.
- Record
CVE-2026-28465- CVSS 4.0
- 8.2 High
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N - Weakness
- CWE-290
- Updated
- 2026-11-02
OSVGHSA-3m3q-x3gj-f79x
OpenClaw optional voice-call plugin: webhook verification may be bypassed behind certain proxy configurations
Affected Packages / Versions
This issue affects the optional voice-call plugin only. It is not enabled by default; it only applies to installations where the plugin is installed and enabled.
- Package:
@openclaw/voice-call - Vulnerable versions:
< 2026.2.3 - Patched versions:
>= 2026.2.3
Legacy package name (if you are still using it):
- Package:
@clawdbot/voice-call - Vulnerable versions:
<= 2026.1.24 - Patched versions: none published under this package name; migrate to
@openclaw/voice-call
Summary
In certain reverse-proxy / forwarding setups, webhook verification can be bypassed if untrusted forwarded headers are accepted.
Impact
An external party may be able to send voice-call webhook requests that are accepted as valid, which can result in spoofed webhook events being processed.
Root Cause
Some deployments implicitly trusted forwarded headers (for example Forwarded / X-Forwarded-*) when determining request properties used during webhook verification. If those headers are not overwritten by a trusted proxy, a client can supply them directly and influence verification.
Resolution
Ignore forwarded headers by default unless explicitly trusted and allowlisted in configuration. Keep any loopback-only development bypass restricted to local development only. Upgrade to a patched version.
If you cannot upgrade immediately, strip Forwarded and X-Forwarded-* headers at the edge so clients cannot supply them directly.
Fix Commit(s)
a749db9820eb6d6224032a5a34223d286d2dcc2f
Credits
Thanks @0x5t for reporting.
- Record
GHSA-3m3q-x3gj-f79x- CVSS 4.0
- 8.2 High
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N - CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-287, CWE-290, CWE-345
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
@openclaw/voice-callnpm |
before 2026.2.3 | 2026.2.3 |
@clawdbot/voice-callnpm |
through 2026.1.24 | None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-28465 is a high vulnerability (CVSS 8.2) in Openclaw, published February 17, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.43%, the 37th percentile. Fixed in @openclaw/voice-call 2026.2.3.
References
github.com/openclaw/openclaw/security/advisories/GHSA-3m3q-x3gj-f79x
vulncheck.com/advisories/openclaw-voice-call-webhook-verification-bypass-via-forwarded-headers
nvd.nist.gov/vuln/detail/CVE-2026-28465